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atomic number 77 |
atomic number 78 |
atomic number 79 |
atomic number 8 |
atomic number 80 |
atomic number 81
| atomic number 82
| atomic number 83
| atomic number 84
| atomic number 85
| atomic number 86
atomic number 81
WORDNET DICTIONARY
Noun atomic number 81 has 1 sense
- atomic number 81(n = noun.substance) thallium, tl - a soft grey malleable metallic element that resembles tin but discolors on exposure to air; it is highly toxic and is used in rodent and insect poisons; occurs in zinc blende and some iron ores; Array is a kind of metal, metallic element
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